GitHub - ahnlak/ABVCalc: A flexible Javascript ABV Calculator, for hydrometers and refractometers - primarily for beer brewers.
GitHub - mboren/hydrometer-calculations: Hydrometer adjustment/%ABV calculator for brewers with a focus on rapid and simple input
![Refractometer calculator question. Do I input brix for OG and FG or can I dial in the SG at the top and it calculates backwards? Or is this just a stupid question? : Refractometer calculator question. Do I input brix for OG and FG or can I dial in the SG at the top and it calculates backwards? Or is this just a stupid question? :](https://i.redd.it/4cmsi6lv1an71.jpg)